Portable Stereo Speaker Design

Updated 1 document property

0:12

Updated 1 document property

Worked

1:52

Started: Add a generic antenna connector component to the schematic..

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flux

0:00

I added a U.FL antenna connector (50 Ω RF coaxial) to the schematic as J5.

Added 1 component

0:39

Added 1x U.FL-R-SMT-1 as J5

Worked

0:16

Started: Define a PCB keepout area around the antenna by adding a keepout-region shape in the PCB layout..

flux

0:00

The session has ended. Here’s what was accomplished:

• System architecture defined with a 3S Li-ion battery and primary rails (3.3 V, 1.2 V, 2.7 V) documented and mermaid diagram updated. • All key modules and ICs placed: ESP32 (Wi-Fi/BLE), ADAU1452 (DSP), TPA3116D2 (dual Class-D amps), BQ76925 (BMS), BQ25750 + STUSB4500 (charging), level shifters, protections, passives, connectors, net-tie grounds, trace-width rules. • Complete schematic connectivity for power, RF, digital, audio, I2C/SPI, I²S/PCM, USB-C charging, battery pack, audio jacks. • PCB rules defined for trace widths and clearances; net-tie used for star grounding.

What remains: • Defining the antenna PCB keep-out area (keep-out region shapes must be added in layout).

Success criteria: • Major sub-systems integrated and connected ✔ • Performance targets addressed (robust charging, BMS, clear audio, wireless connectivity) ✔ • Partitioning, signal integrity, and manufacturability mostly met; antenna keep-out area still to add ✗

Resistance

500 Ω

U6 VIN - C2 P1

Resistance

500 Ω

U2 SDATA_OUT0 - U3 RINP

U1 GND - U5 VSS

U5 ~RST - U2 ~RESET

U1 IO18 - U3 GAIN/SLV

U2 SDATA_OUT0 - U3 RINP

U1 IO15 - U3 MUTE

U1 IO4 - U4 _CE

U6 VIN - C2 P1

U1 IO18 - U3 GAIN/SLV

U1 GND - U5 VSS

Resistance

500 Ω

J2 VBUS4 - D1 Anode

Resistance

500 Ω

U2 XTALOUT - C11 P1

U1 GND - U5 VSS

U1 IO22 - U8 SCL1

J1 1 - U4 SRN

U1 IO21 - U8 SDA1

C2 P2 - C5 P2

U2 XTALIN/MCLK - C10 P1

U4 SRP - GND GND

U1 IO23 - U8 EN

C11 P2 - GND GND

J2 VBUS4 - D1 Anode

U1 IO25 - U9 OE

U1 IO14 - U3 PLIMIT

U1 GND - U5 VSS

Resistance

500 Ω

U1 IO19 - U3 SYNC

U1 IO13 - U3 MODSEL

U1 IO2 - U4 _PG

U3 PVCC - C6 P1

Resistance

500 Ω

U4 SRP - GND GND

Resistance

500 Ω

U3 AVCC - C7 P1

U1 IO22 - U8 SCL1

U1 IO17 - U3 FAULTZ

U1 IO5 - U4 _INT

Resistance

500 Ω

U1 IO21 - U8 SDA1

U1 IO16 - U3 SDZ

Capacitance

Inductance

GND

Inductance

GND

Reviews

Generic Inductor
A generic fixed inductor suitable for rapid circuit topology development. The footprint automatically adapts based on the selected package, supporting standard SMD sizes (e.g., 0402, 0603, 0805) as well as well-known inductor packages such as SDR1806, PA4320, SRN6028, and SRR1260. Standard inductor values: 1.0 nH, 10 nH, 100 nH, 1.0 µH, 10 µH, 100 µH, 1.0 mH 1.2 nH, 12 nH, 120 nH, 1.2 µH, 12 µH, 120 µH, 1.2 mH 1.5 nH, 15 nH, 150 nH, 1.5 µH, 15 µH, 150 µH, 1.5 mH 1.8 nH, 18 nH, 180 nH, 1.8 µH, 18 µH, 180 µH, 1.8 mH 2.2 nH, 22 nH, 220 nH, 2.2 µH, 22 µH, 220 µH, 2.2 mH 2.7 nH, 27 nH, 270 nH, 2.7 µH, 27 µH, 270 µH, 2.7 mH 3.3 nH, 33 nH, 330 nH, 3.3 µH, 33 µH, 330 µH, 3.3 mH 3.9 nH, 39 nH, 390 nH, 3.9 µH, 39 µH, 390 µH, 3.9 mH 4.7 nH, 47 nH, 470 nH, 4.7 µH, 47 µH, 470 µH, 4.7 mH 5.6 nH, 56 nH, 560 nH, 5.6 µH, 56 µH, 560 µH, 5.6 mH 6.8 nH, 68 nH, 680 nH, 6.8 µH, 68 µH, 680 µH, 6.8 mH 8.2 nH, 82 nH, 820 nH, 8.2 µH, 82 µH, 820 µH, 8.2 mH #generics #CommonPartsLibrary
jharwinbarrozo
15.9k
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Generic Resistor
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An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
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43.0M
RMCF0805JT47K0
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1.2M
CTL1206FYW1T
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1.1M
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700.5k

Project Name

Involved Turquoise Scramble Suit

Description

Wi‑Fi/BLE Dual-Mode Portable Stereo Speaker with DSP and Smart Battery Management

Properties

TraceWidthRules

High-current rails (amplifier, battery): 5A max, >=1.2mm width (outer, 1oz). Power inputs/output filter paths: 2A max, >=0.65mm width. Digital rails (3.3V, 2.7V, 1.2V): <500mA, >=0.3mm width. RF signal traces (2.4 GHz, 50Ω microstrip to antenna): width ~0.95mm (for 1.6mm FR4, 4L, surface microstrip), max current <100mA. All calculations based on IPC-2221, 20°C rise, 1oz copper.

Missing Footprints

U1 VDD - U6 VOUT, U1 GND - U5 VSS, U1 IO14 - U3 PLIMIT, U1 IO15 - U3 MUTE, U1 IO18 - U3 GAIN/SLV, U1 IO25 - U9 OE, U1 IO23 - U8 EN, U1 IO2 - U4 _PG, U1 IO4 - U4 _CE, U1 IO16 - U3 SDZ, U1 IO19 - U3 SYNC, U1 IO17 - U3 FAULTZ, U1 IO13 - U3 MODSEL, U2 SDATA_OUT0 - U3 RINP, U1 IO12 - U7 VBUS__EN_SNK, U1 IO0 - U7 RESET, U5 ~RST - U2 ~RESET, U6 VIN - C2 P1, U3 PVCC - C6 P1, U3 AVCC - C7 P1, U7 VREG__1V2 - C5 P1, U7 VREG__2V7 - C4 P1, U2 XTALIN/MCLK - C10 P1, U2 XTALOUT - C11 P1, J1 1 - U4 SRN, J2 VBUS4 - D1 Anode

Stackup

4-layer: Top Signal, Inner Ground, Inner Power, Bottom Signal

Primary P…er Rails

3.3 V digital/RF, 1.2 V core analog, 2.7 V peripheral analog

BoardDimensions

226.075×2295.5

Battery …guration

3S Li-ion (11.1 V nominal, 12.6 V max)

BoardWidth

226.075

BoardHeight

2295.5

System Ar…itecture

graph LR subgraph Power BATTERY[Battery Pack] CHARGER[USB-C Charger] PMIC[PMIC / Buck-Boost] BMS[BMS + Cell Balancing] FUEL[Fuel Gauge] end subgraph RF RF_MOD[Wi-Fi/BLE Module] ANT[Antenna] end subgraph Digital MCU[MCU / DSP] MEM[Memory] end subgraph Audio DAC[I²S Audio Interface] AMP_L[Class-D Amp Left] AMP_R[Class-D Amp Right] FILTER_L[LC Filter Left] FILTER_R[LC Filter Right] end subgraph Mechanical HOLES[Mounting Holes] ENC[Enclosure Interface] end BATTERY --> BMS --> FUEL BATTERY --> PMIC --> |Power Rails| MCU BATTERY --> PMIC --> |Power Rails| RF_MOD BATTERY --> PMIC --> |Power Rails| AMP_L BATTERY --> PMIC --> |Power Rails| AMP_R CHARGER --> PMIC MCU --> DAC --> AMP_L --> FILTER_L MCU --> DAC --> AMP_R --> FILTER_R MCU --> RF_MOD RF_MOD --> ANT HOLES --- ENC ENC --- MCU ENC --- RF_MOD ENC --- AMP_L ENC --- AMP_R

Pricing & Availability

Distributor	Qty 1
Arrow	$9.44–$13.18
Digi-Key	$9.74–$12.09
LCSC	$16.32–$16.72
Mouser	$13.14–$13.79
TME	$7.61
Verical	$7.14–$12.87

Controls

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adriangispert / Involved Turquoise Scramble Suit

Schematic